First report of soybean damping off caused by Pythium aphanidermatum and P. coloratum in Japan.
In June 2016, severe damping-off was found on soyabean cv. Ezomidori grown in a field converted from a rice paddy in Osaka, Japan. Approximately 10% of all soyabean plants were destroyed by the disease. The causal pathogens were isolated and identified as Pythium aphanidermatum and P. coloratum based on morphological, molecular and pathogenicity analyses. This is thought to be the first report of P. aphanidermatum and P. coloratum causing damping-off on soyabean in Japan.